1. A researcher is investigating the relationship between the size of a bird's beak and the type of food it eats. They measure the beak length and width of 50 birds of the same species and record the primary food source for each bird. The data they collect is as follows: Beak length (mm): 12, 14, 15, 16, 17, 18, 19, 20, 21, 22 Beak width (mm): 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 Food type: Seeds, Seeds, Seeds, Seeds, Seeds, Insects, Insects, Insects, Insects, Insects The researcher performs a linear regression analysis on the data and finds that the regression equation for beak length and food type is: Food type = -0.5 * Beak length + 12 Based on this regression equation, which of the following conclusions can the researcher draw about the relationship between beak size and food type?

2. A researcher is studying the effects of a new drug on the growth of bacteria. They inoculate 12 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish. The researcher wants to determine if there is a correlation between the drug concentration and the diameter of the bacterial colonies. Which statistical analysis would be most appropriate for the researcher to use?

3. A researcher is studying the effects of a new fertilizer on the growth of tomato plants. They plant 20 tomato seedlings in pots and divide them into 4 groups of 5 plants each. They apply different concentrations of the fertilizer to each group and measure the height of the plants after 4 weeks. Which statistical test would be the most appropriate for the researcher to use to analyze the data and determine the effect of the fertilizer concentration on plant growth?

4. A researcher is investigating the effect of light intensity on the rate of photosynthesis in a plant. They set up four experiments, each with the same plant species and growth conditions, but with different light intensities: 100 lux, 500 lux, 1000 lux, and 2000 lux. They measure the rate of oxygen production in each experiment as an indicator of the rate of photosynthesis. Which of the following graphs would best represent the relationship between light intensity and the rate of photosynthesis?

5. A researcher is studying the effects of a new drug on the growth of bacteria. They inoculate 4 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish. Which of the following is the best way to analyze the data and determine the effect of the drug concentration on bacterial growth?

6. A researcher is investigating the relationship between the size of a bird's beak and the type of food it eats. They measure the beak length and width of 50 birds of the same species and record the primary food source for each bird. The data they collect is as follows: Beak length (mm): 12, 14, 15, 16, 17, 18, 19, 20, 21, 22 Beak width (mm): 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 Food type: Seeds, Seeds, Seeds, Seeds, Seeds, Insects, Insects, Insects, Insects, Insects Based on the data, which of the following conclusions can the researcher draw about the relationship between beak size and food type?

7. A researcher is studying the effects of a new drug on the growth of bacteria. They inoculate 4 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish and obtain the following results: Dish 1 (control, no drug): Bacterial colony diameter (mm): 12, 13, 14, 15, 16 Dish 2 (low drug concentration): Bacterial colony diameter (mm): 10, 11, 12, 13, 14 Dish 3 (medium drug concentration): Bacterial colony diameter (mm): 8, 9, 10, 11, 12 Dish 4 (high drug concentration): Bacterial colony diameter (mm): 5, 6, 7, 8, 9 Based on the data, which of the following conclusions can the researcher draw about the effect of the drug on bacterial growth?

8. A scientist is studying the effects of temperature on the rate of a chemical reaction. They set up four experiments, each with the same starting materials and reaction conditions, but with different temperatures. After a fixed time, they measure the amount of product formed in each experiment. Which of the following is the best way to analyze the data and determine the effect of temperature on the reaction rate?

9. A researcher is studying the effects of a new drug on the growth of bacteria. They inoculate 4 petri dishes with the same strain of bacteria and expose them to different concentrations of the drug. After 24 hours, they measure the diameter of the bacterial colonies in each dish. Which of the following is the best way to analyze the data and determine the effect of the drug concentration on bacterial growth?

10. A researcher is studying the effects of a new drug on the survival of cancer cells in a petri dish. They expose the cancer cells to different concentrations of the drug and measure the percentage of cells that survive after 48 hours. The researcher wants to determine the minimum concentration of the drug that is effective in killing at least 80% of the cancer cells. Which of the following methods would be most appropriate for the researcher to use to determine this?